ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (6): 133-144. doi: 10.7668/hbnxb.20190270

Special Issue: Wheat

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Studies on Yield Formation and Nitrogen Utilization Characteristics of Different Winter Wheat Varieties under Rain-fed Condition

LIU Haihong, XU Xuexin, WU Shanshan, YU Siyi, SHI Yan, ZHAO Changxing   

  1. Shandong Provincial Key Laboratory of Dryland Farming Technology, College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2019-09-07 Published:2019-12-28

Abstract: In order to screen high-yielding and efficient winter wheat varieties for rainfed region of Ludong, the field experiments were carried out in 2016-2018 growing seasons under rainfed condition, and 32 medium-strong gluten winter wheat varieties cultivated in Huang-Huai-Hai region were used to explore the changes of grain yield, dry matter accumulation and remobilization, nitrogen uptake and utilization of winter wheat varieties and so on. The results showed that 32 winter wheat varieties could be classified into 5 types by cluster analysis based on the grain yield. During the two growing years, grain yield of type Ⅰ were 9 247.1,9 219.7 kg/ha, respectively, which were significantly higher than those of other winter wheat types, and type Ⅰ winter wheat varieties synergistically increased sink capacity(grain number per unit area) and 1000-grain weight. Maturity and post-anthesis dry matter accumulation, pre-anthesis dry matter remobilization, harvest index, maturity nitrogen accumulation, nitrogen use efficiency and nitrogen harvest index of type Ⅰ winter wheat varieties were significantly higher than those of other winter wheat types. Grain yield was significantly and positively correlated with sink capacity, maturity and post-anthesis dry matter accumulation, harvest index, nitrogen use efficiency and nitrogen harvest index, respectively; grain yield was significantly and positively correlated with maturity nitrogen accumulation as well in 2017-2018 growing seasons. Based on the two year results, both Yannong 999 and Taimai 1918 belonged to type Ⅰ winter wheat varieties. Those two varieties synergistically increased sink capacity and 1000-grain weight, post-anthesis dry matter accumulation and dry matter remobilization, maturity dry matter accumulation and harvest index, maturity nitrogen accumulation and nitrogen harvest index, so the grain yield was significantly higher and more stable. In conclusion, under the semi-humid and drought climate and rain-fed conditions of Ludong region, Yannong 999 and Taimai 1918 were high-yielding and high efficient winter wheat varieties which were suitable for planting in this region.

Key words: Winter wheat, Varieties, Sink capacity, Dry matter accumulation, Nitrogen use efficiency, Rainfed condition

CLC Number: 

Cite this article

LIU Haihong, XU Xuexin, WU Shanshan, YU Siyi, SHI Yan, ZHAO Changxing. Studies on Yield Formation and Nitrogen Utilization Characteristics of Different Winter Wheat Varieties under Rain-fed Condition[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(6): 133-144. doi: 10.7668/hbnxb.20190270.

share this article